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1
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Monthly Downloads: 16
Programming language: HTML
License: BSD 3-clause "New" or "Revised" License
Tags: Unclassified     Diplomacy    

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README

diplomacy-server

Play the board game Diplomacy over HTTP. Players may participate via their own private devices, so long as they have network capabilities and a good web browser.

Quick start

Start by installing the program.

git clone git@github.com:avieth/diplomacy-server.git
cd diplomacy-server
cabal install

In order to get up and running you need a public/private key pair and certificate, because the web server uses secure HTTP. Here's how to create a key pair and self-sign a certificate using OpenSSL. Note that your browser will warn of an untrusted certificate when you connect to the server.

openssl req -x509 -newkey rsa:2048 -keyout server.key -out server.pem -days 365 -nodes

When running the server, the key and certificate file locations can be specified using -k and -c respectively; the defaults are ./key.pem and ./certificate.pem. When running the server you must also give a username and password for the administrator. These credentials allows you to create, start, advance, pause, and destroy games. The password is taken after running the command, rather than as an argument.

./Main -u <username>

The default port is 4347, but this can be changed using --port or -p. With the server running, navigate to https://<host>:4347/v1.0.0/diplomacy to begin playing via the simple but effective web client. The workflow is as follows:

  1. Administartor creates a game, choosing a password for it.
  2. Players join the game using the administartor's chosen password.
  3. Adminstrator starts the game. A game cannot be started unless there are at least 3 players in the game. Two player diplomacy is not supported.
  4. Players use their own devices (smartphones, laptops) to view game state and issue orders.

The game will advance automatically unless the adminstrator pauses the game. In this case, the game will advance only when the adminstrator explicitly advances it, at which point the automatic advance feature kicks in again. This is useful for putting a game on indefinite hiatus.

The simple client

The file client.html is a barebones, not-so-user-friendly interface for players and administrators (game-masters, if you will). It should provide all necessary functionality to play a complete match, and should work properly on all smartphones and personal computers with up-to-date web browsers.

To input typical and retreat phase orders using this client, one must type the order object as it would be written in a pen-and-paper game; the map is not interactive, but this would be a nice improvement.

A better HTML/JavaScript client, or even native iOS and Android clients, would be very nice to have. Ideally, we could use the definitions of the diplomacy Haskell library to produce these clients. This way, we don't need to reproduce the basic definitions like those related to provinces and their adjacency, and we could also use order validation definitions to give helpful feedback when the user attempts to input a new order (highlighting valid move targets or support subjects, for instance).

A note on REST

This program uses the rest package, but it doesn't give a RESTful API; the server is stateful. This package was chosen because it was relatively quick and easy. It ought to be swapped out for something which

  1. Does not claim to be RESTful.
  2. Allows us to easily reuse handlers for HTTP and Email input.